added possibility to wait for nodes to shutdown (waiting only for launch before).
added possibility to wait for nodes to shutdown (waiting only for launch before).

gormanb/mtools,aerrami/mtools,corymintz/mtools,gormanb/mtools,ces0712/mtools,yaowenqiang/mtools,devkev/mtools,ces0712/mtools,ces0712/mtools,parkhyeonghwa/mtools,yaowenqiang/mtools,tomzhang/mtools,corymintz/mtools,parkhyeonghwa/mtools,tomzhang/mtools,gormanb/mtools,aerrami/mtools,parkhyeonghwa/mtools,corymintz/mtools,rueckstiess/mtools,rueckstiess/mtools,devkev/mtools,devkev/mtools,tomzhang/mtools,aerrami/mtools,yaowenqiang/mtools